Idiom: Know where all the bodies are buried

Idiom Definitions for 'Know where all the bodies are buried'

Someone who by virtue of holding a position of trust with an organization for a long period of time has come to know many of the secrets that others in more powerful positions would rather be kept secret knows where the bodies are buried. An implication is that the person knowing these secrets will use that knowledge to secure something of value for him- or herself.